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130 lines
2.2 KiB
C++
130 lines
2.2 KiB
C++
#ifndef LOG_H__
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#define LOG_H__
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#include <string>
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#include <iostream>
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#include <sstream>
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#include <fstream>
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#include <functional>
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#include <chrono>
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#include "Queue.h"
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enum LogLevel
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{
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eLogError = 0,
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eLogWarning,
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eLogInfo,
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eLogDebug,
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eNumLogLevels
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};
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class Log;
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struct LogMsg
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{
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std::stringstream s;
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Log * log;
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LogLevel level;
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LogMsg (Log * l = nullptr, LogLevel lv = eLogInfo): log (l), level (lv) {};
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void Process();
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};
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class Log: public i2p::util::MsgQueue<LogMsg>
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{
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public:
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Log (): m_LogStream (nullptr) { SetOnEmpty (std::bind (&Log::Flush, this)); };
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~Log () { delete m_LogStream; };
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void SetLogFile (const std::string& fullFilePath);
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void SetLogStream (std::ostream * logStream);
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std::ostream * GetLogStream () const { return m_LogStream; };
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const std::string& GetTimestamp ();
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private:
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void Flush ();
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private:
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std::ostream * m_LogStream;
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std::string m_Timestamp;
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#if (__GNUC__ == 4) && (__GNUC_MINOR__ <= 6) && !defined(__clang__) // gcc 4.6
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std::chrono::monotonic_clock::time_point m_LastTimestampUpdate;
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#else
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std::chrono::steady_clock::time_point m_LastTimestampUpdate;
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#endif
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};
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extern Log * g_Log;
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inline void StartLog (const std::string& fullFilePath)
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{
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if (!g_Log)
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{
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auto log = new Log ();
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if (fullFilePath.length () > 0)
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log->SetLogFile (fullFilePath);
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g_Log = log;
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}
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}
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inline void StartLog (std::ostream * s)
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{
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if (!g_Log)
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{
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auto log = new Log ();
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if (s)
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log->SetLogStream (s);
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g_Log = log;
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}
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}
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inline void StopLog ()
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{
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if (g_Log)
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{
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auto log = g_Log;
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g_Log = nullptr;
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log->Stop ();
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delete log;
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}
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}
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template<typename TValue>
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void LogPrint (std::stringstream& s, TValue arg)
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{
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s << arg;
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}
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template<typename TValue, typename... TArgs>
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void LogPrint (std::stringstream& s, TValue arg, TArgs... args)
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{
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LogPrint (s, arg);
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LogPrint (s, args...);
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}
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template<typename... TArgs>
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void LogPrint (LogLevel level, TArgs... args)
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{
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LogMsg * msg = new LogMsg (g_Log, level);
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LogPrint (msg->s, args...);
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msg->s << std::endl;
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if (g_Log)
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g_Log->Put (msg);
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else
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{
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msg->Process ();
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delete msg;
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}
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}
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template<typename... TArgs>
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void LogPrint (TArgs... args)
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{
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LogPrint (eLogInfo, args...);
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}
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#endif
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